replace castclass by IsInst when sure it's not null

diff --git a/src/Instantiator.cs b/src/Instantiator.cs
index 90cb80451d7578c9fdf572d643401a10a47ceae3..d4178dbf4781e34d481fdf4f5e965e21163fad41 100644 (file)
--- a/src/Instantiator.cs
+++ b/src/Instantiator.cs
@@ -1124,7 +1124,7 @@ namespace Crow
                        if (dstType.IsValueType)
                                il.Emit (OpCodes.Unbox_Any, dstType);
                        else
-                               il.Emit (OpCodes.Castclass, dstType);
+                               il.Emit (OpCodes.Isinst, dstType);
                        il.Emit (OpCodes.Br, endConvert);
 
                        il.MarkLabel (convert);